Mechanical time-fuse.



K. WIBSER.

MECHANICAL TIME FUSE. AIPPLIOATION FILED SEPT,14, 1911.

1,029,036, Patented June 11, 1912.

STATE% PATENT @hhllOE.

KARL WIESER, OF BREDENEY, GERMANY, ASSIGNOR TO FRIED. KRUPP AK'IIENGE- SELLSCHAFT, OF ESSENON-THE-RUHR, GERMANY.

MECHANICAL TIME-FUSE.

Specification of Letters Patent.

Patented Jnnell, 1912.

Original application filed July 1, 1910, Serial No. 569,911. Divided and this application filed September 14,

Mechanical ilime-l uses, of which the following is a specification.

This application is a division of my application filed July 1, 1910, Serial No. 569,911.

The invention relates to mechanical time fuses the setting of which is effected by rotating an external part of the fuse, which external part is connected 'by a clutch (which releases itself automatically on firing and acts in both directions of rotation) to a locking disk which determines the instant of the release of the igniting apparatus. In known fuses of this kind the clutch consists of a tongue attached to the locking disk and an inwardlybcnt flat spring attached to the external part of the fuse, and provided with a slotinto which the tongue of the locking disk enters. During the flight of the projectile this spring bends outwardly under the action of centrifugal force and at the same time releases the tongue of the locking disk. The disadvantage of this clutch is that the adjustments of the fuse are easily rendered inaccurate. The spring may stretch or'b end inward on the rotation of the outer'part of the fuse and according to the direction in which the rotation takes place. hen the fuse is set, the revolving external part of the fuse advances beyond the locking disk, by the amount by which the spring has become lengthened or shortened, whereby errors in the setting of the fuse are caused.

Now the object of the present invention is to provide for mechanical time fuses of the kind hercinbefore mentioned, a clutch which will enable the fuse to be accurately set by means of the external revolving part thereof. This end is attained, according to the invention, by the use of a clutch in which both that member thereof which is mounted on the locking disk, and the one mounted on the external revolving partof the fuse, is unyielding in the direction of rotation.

In the embodiment of the invention specifically claimed in my previous application above identified, said clutch comprises a slidable bolt engaging a tongue attached to the locking disk.

Serial No. 649,358.

According to the form constituting the basis of this application a hinged lever carried by the external revolving part, is used, instead of the sliding bolt, the lever engaging a tongue attached to the locking disk.

In the accompanying drawing is shown aform of a mechanical time fuse constructed according to this invention, and provided with a clockwork movement.

Figure 1 is a longitudinal section through the fuse (partly in elevation) in its transport state; Fig. 2 shows a section of the fuse similar to Fig. 1. but after firing, Fig. 3 is a detail of part of the clutch and Fig; 4: is a section on line 4:4.- of Fig. 1, looking from above.

A denotes the locking disk which determines the instant of the release of the igniting apparatus and can be rotated by the clockwork in the direction of the arrow Fig. 4, and B is the external revolving part of the fuse which is made in the shape of a cap. Thecnp B is coupled to the locking disk A. by a tongue (4 which projects in radial direction beyond the periphery of the locking disk A and engages aslot. (1 (Fig. 4. of a lever 1*] without lateral play, when the fuse in transport state. The lever 19 is mounted on the free end of a flat spring F secured to the cap 13 and forms one limb of a trip catch. The front face of the end of the lever 1*] lying in the vicinity of it-s journal lies. ii1 the transport state of the fuse, snugly against the inner wall of the cap 13.

Sine the cap B and locking disk are unyicldingly coupled in the direction of rota tion of the cap by the lever i and the tongue at, no errors in the setting of the fuse can arise.

)n firing the lever 1G is tilted downward under the action of inertia. The flat, spring 1* is at the same time Iirst'lil'lod from the wall. of the: cap, and then approaching the wall of the rap again, forces the lever, after ithas overstepped the tilting position (see Fig.2, dotted position), into the position a rotatable member which etlects the release of the priming mechanism, and a non-yielding coupling between the rotatable member and said outer primer part; said coupling comprising a hinged part carried by the outer primer part and adapted to disconnect the coupling through inertia on tiring and permit of rotation of the rotary member.

2. A mechanical time-primer having an outer primer part for effecting adjustment, a rotatable member which effects the release of the priming mechanism, and a non-yielding coupling between the rotatable member and said outer primer part; said coupling comprising a member carried by the ratatable part and a lever pivotally mounted on the outer primer part adapted to engage with said member and to become disengaged by the action of inertia on firing, and a spring adapted to hold said lever in engaging or released position.

3. A mechanical time-primer having an outer primer part for effecting adjustment, a rotatable member which effects the release of the priming mechanism, and a non-yielding coupling between the rotatable member and said outer primer part; said coupling comprising a tongue carried by the rotatable part, a spring secured to the inner face of the outer primer part, a lever pivotally mounted on the spring and adapted to engage with said tongue and to become disengaged by the action of inertia on firing, said lever having a part held in frictional engagement with the inner face of the outer primer part by the spring whereby to hold the lever in operative position during transport of the primer.

4:. A mechanical time-primer haying an outer primer part for effecting adjustment, a rotatable member 'Which eiiects'the release of the priming mechanism, and a nonyielding coupling between the rotatable member and said outer primer part; said ccuiplingcomprising a tongue carried by the rotatable part; a spring secured to the inner face of the outer primer part, a bi furcated lever pivotally mounted on the spring, the prongs of said lever adapted to engage with said tongue during the transportstate of the fuse and to become disengaged by the action of inertia on firing, said lever having further a fiat face engaging the inner face of theouter primer part actuated by said spring to hold the lever in operatii'e position. I

The foregoing specification signed at Barmen, Germany, this Qetth day of August, 1911. 1

KARL \VIESER. [1,. 5.] In presence of- Annnn'r NUFER, L. Norma. 

